Gerry Couture joined the NHL's Detroit Red Wings for the 1944-45 season but did not suit up for any games with the war effort not yet completed. In 1945-46, he took to the ice on 43 occasions, scoring three goals and ten points.

The 1946-47 season was split between the Red Wings and Indianapolis of the AHL, where he posted 24 goals and 42 points in just 34 games. He rejoined the Red Wings on a full-time basis the following two years, posting 29 and 31-point seasons, respectively. The 1950 Red Wing club proved to be the best in the NHL, coming away with the Stanley Cup. A drop in production in 1950-51 had the team and Couture believing that a change was in order. He played for the Montreal Royals of the Quebec League, the Cleveland Barons of the AHL, and ten games with the Montreal Canadiens in 1951-52 before moving on to the Chicago Blackhawks for the 1952-53 campaign. That season, he played in 70 games, scoring 19 goals and 37 points.

The final NHL season for Couture was 1953-54 when he scored 11points for the Blackhawks. He continued to play professional hockey for another four years in the WHL, three with the Calgary Stampeders, and finally with the Saskatoon Royals in 1957-58.